Dizziness (Latin: "Vertigo") is the sensation of instability. It has many potential causes, ranging from harmless to life-threatening. One of the most common causes of dizziness is rapid spinning; this cause lent its name to the baseball pitcher Dizzy Dean, whose windup while throwing the ball caused him to spin completely around.

Rotational vertigo:

• Meniere's disease
• Benign paroxysmal postural vertigo
• Pontine angle tumor (Neurinoma of the Acoustic nerve )
• etc.

Postural vertigo:

• Arteria basilaris syndrome
• Orthostatic hypotension
• etc.